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Forged Fittings
Forged fittings are divided into: – Socket Weld (SW) fittings Class 3000, 6000, 9000 are defined in the ASME B16.11 standards. A Socket Weld fitting is a pipe attachment detail in which a pipe is inserted into a recessed area of a valve, fitting or flange. In contrast to buttweld fittings, Socket Weld fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller.
– Threaded (THD), screwed fittings Class 2000, 3000, 6000 are defined in the ASME B16.11 standards. Threaded joints probably represent the oldest method of joining piping systems. Like Socket Weld fittings, threaded fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller.